Question

At 500 °C, hydrogen iodide decomposes according to

2HI(g)↽−−⇀H2(g)+I2(g)

For HI(g) heated to 500 °C in a 1.00 L reaction vessel, chemical analysis determined these concentrations at equilibrium: [H2]=0.359 M , [I2]=0.359 M , and [HI]=3.03 M . If an additional 1.00 mol of HI(g) is introduced into the reaction vessel, what are the equilibrium concentrations after the new equilibrium has been reached?

[HI]=
M
[H2]=
M
[I2]=
M